Measure and cut out a piece of webbing (5)
I believe the answer is:
cubit
'a piece of webbing' is the definition.
I can't tell whether this definition defines the answer.
'measure and cut out' is the wordplay.
'measure' becomes 'bit' (bit is a kind of measure).
'and' is a charade indicator (letters next to each other).
'out' means to remove the last letter.
'cut' with its final letter taken off is 'cu'.
'bit' after 'cu' is 'CUBIT'.
Can you help me to learn more?
(Other definitions for cubit that I've seen before include "about eighteen inches" , "Biblical measure of length" , "two such might have been in the yard" , "Old measure of length (from elbow to fingertips)" , "Ancient measure about the length of an arm" .)